internal PageableResult(
CanvasApiClient apiClient,
PageLinks pageLinks
)
{
this._initalPageLinks = pageLinks ?? throw new ArgumentNullException(nameof(pageLinks), "Paging details not supplied.");
this._ApiClient = apiClient;
}
internal PageableResult(
IEnumerable <TResult> initialBuffer,
CanvasApiClient apiClient,
PageLinks pageLinks
) : this(apiClient, pageLinks)
{
this.InitialBuffer = initialBuffer?.ToArray() ?? Array.Empty <TResult>();
}
internal async Task <IEnumerable <TResult> > PagableApiOperation <TResult, TBody>(
HttpMethod verb,
string url,
TBody body,
PagingOptions pagingOptions = null,
CancellationToken cancellationToken = default)
where TBody : class
{
var pageLinks = new PageLinks((pagingOptions ?? this.DefaultPagingOptions)?.AddPagingUrl(url) ?? url);
var initialBuffer = await this.ApiOperation <IEnumerable <TResult>, TBody>(verb, pageLinks.OriginalUrl, body, pageLinks, cancellationToken);
return(new PageableResult <TResult>(initialBuffer, this, pageLinks));
}
internal async Task <TResult> ApiOperation <TResult, TBody>(
HttpMethod verb,
string url,
TBody body,
PageLinks pageLinks = null,
CancellationToken cancellationToken = default)
where TBody : class
{
var httpMessage = this.GenerateHttpRequest(verb, url, body);
var result = await this.Client
.SendAsync(httpMessage, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
if (result.IsSuccessStatusCode)
{
var content = await result.Content.ReadAsStringAsync();
if (pageLinks != null)
{
pageLinks.SetHeaders(result.Headers);
}
await using var contentStream = await result.Content.ReadAsStreamAsync();
using var streamReader = new StreamReader(contentStream);
using var reader = new JsonTextReader(streamReader);
var serializedCollection = new JsonSerializer()
{
ContractResolver = new DefaultNemesContractResolver()
}.Deserialize <TResult>(reader);
return(serializedCollection ?? default(TResult));
}
throw result.ToException();
}